Figure 2

(Graph) Theoretical spectra of the average EM field intensity within the Ni nanowires. For the same system described in Figure 1a. The continuous, dashed, short-dashed, and dotted lines correspond to a decreasing refractive index of the embedding medium (from n = 1.7 to n = 1.4, respectively). (Top) Unit cells employed in the FDTD calculations, showing the EM field distribution in the system at the energies where the LSP is excited (maximum field concentration within the nanowire). The dashed ring delimits the nanowire section.